So you have a week and you want to see the highlights? Likely flying in from somewhere 12+ hours away and have from one weekend to the next for vacation? My suggestion would be to focus on Torres del Paine National Park and the Perito Moreno Glacier from El Calafate
You could make your way down to Punta Arenas, but I just think that the scenery around El Calafate area beats it in every respect. You don’t really have time for the Navimag ferry through the Fjords. Parque Nacional los Alerces is too far away. And don’t waste your time going to see the King Penguins at Porvenir
The only place that you should consider squeezing in is the hiking around El Chalten, but we didn’t get a chance to check it out and it would be tight
By giving yourself 4 nights in Torres del Paine / Puerto Natales, a day to see the Perito Moreno Glacier and a day and a half or so of driving (including crossing the Argentina – Chile border), you’ll leave tired but not exhausted, and with a feeling of awe for Patagonia